frequency dependency of magnetic susceptibility in sp magnetite grains
نویسندگان
چکیده
using a magnetic property measurement system (mpms), we measure magnetic susceptibility continuously at frequencies from 0 to 1000 hz for three different superparamagnetic (sp) grain sizes of magnetite (5nm, 7 nm and 10 nm) suspended in hydrocarbons (ferrofluids). our results confirm non-zero values of frequency-dependent susceptibility in the fine tail of nano-sized grains and provide new empirical data for the degree of interaction between sp grains (nano particles) affecting magnetic susceptibility and frequency-dependent susceptibility.
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عنوان ژورنال:
فیزیک زمین و فضاجلد ۳۸، شماره ۱، صفحات ۱-۹
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